INTERNATIONAL STANDARD 1 1 1 3 I NTERNATIONAL ORGANIZATION FOR STANDARDIZATION*ME~YHAPO/lHAR OPrAHH3AL&lR n0 CTAH&WT! l 3Al JHU ORGANISATlON INTERNATIONALE DE NORMALISATION I nformation processing Rep[.]
Trang 1INTR ATIO AL O G NIZATIO FO STA DRIZATIO *ME YAO/lHR O rAH3AL&lR n CTA&WT!l3A lJH O G NISTlO INT RATIO AL DE N RMALISTIO
T raiteme t d l n forma tio - Re &e ta tio s r b n e p t ort% du jeu d w rac t&es co &
i 7 M e ts
Ref No IS0 1 13-1979 (E)
Desc riptors : data procesin, c ha ra c ter sets, coded c ha ra c ter sets, reresenta tion of c ha ra c ter s, pu ced ta pes, IS0 sev en-bit c odes
Trang 2IS0 (h Intern tio al Org nizatio for Sta d rdizatio ) is a w orldwid fe eratio
of n tio al sta d rds institutes (IS0 memb r b dies) Th work of d v lo in
Intern tio al Sta d rds is carie out throug IS0 tech ical commite s Ev ry
memb r b dy intereste in a s bject for which a tech ical com ite h s b e set
up h s th rig t to b re rese te o th t com ite Intern tio al org nizatio s,
g v rnme tal a d n n-g v rnme tal in laiso w ith ISO, also ta e p rt in th w ork
Draf Intern tio al Sta d rds a o te by th tech ical com ite s are circ late
to th memb r b dies for a pro al b fore th ir ac e ta ce as Intern tio al
Sta d rds by th IS0 Counci
circ late to th memb r b dies in Fe ruary 19 8
It h s b e a pro e by th memb r b dies of th folow in countries :
South A frica, Re of
Sp in
Sw itzerla d
Turk y
Unite Kin d m
U.S.S.R
No memb r b dy expres e disa pro al of th d c me t
T his seco d e itio ca cels a d re laces th first e itio (IS0 1 13-19 3)
0 International Organization for Stan ardization, 19 9 l
Trang 3Informa tion processing -
This Interna tio a l Sta nd rd sp cifies th re rese ta tio
of th 7-bit co e cha ra cter set o punch d ta pe 2 ,4 m
(1 in) wid
IS0 6 6, 7-bit co e cha ra cter set for inform io
proces in intercha ng
IS0 1 5 , Inform io proces in - Punch d p p r ta pe -
Dime sio s a d loca tio s of fe d h les a d co e h les
ta pe - Sp cifica tio
3 S ECIFICA T IO NS
(Se a lso figures 1 a d 2.)
3.1 Punch d ta e
The ta pe to b u e (of p p r or oth r m eria l) sha ll
coresp n to th re uireme ts in IS0 17 9 re a rdin th
p y ica l cha ra cteristic of 2 ,4 m (1 in) wid punch d
ta pe
3.2 La yout of th tracks
The ta e sha ll co ta in a tra ck of sma ll h les co stitutin
a fe d h le tra ck, pa ra llel to th e g s of th ta pe On
eith r sid of this track th re sha ll b resp ctiv ely 3 a d 5
co e tra cks in which h les may b punch d The p sitio s
a d dime sio s of th h les a d th p sitio s of th tracks
a re sp cifie in IS0 1 5
3.2.1 Refere ce e g
T he refere ce e g sha ll b tha t o th sid of th fe d
3.2.2 Numb rin of th co e tracks
T he co e tra cks sha ll b numb re co sec tiv ely from 1 to
8 sta rtin from th refere ce e g The fe d h le tra ck sha ll
b b twee co e tra cks 3 a d 4
3.3 Cha ra cter set
T he cha ra cter set sha ll b th 7-bit cha ra cter set sp cifie
in IS0 6 6
3.4 Re rese ta tio of co e ch ra cters
sha ll b a ssig e to th re rese ta tio of a b it T he a se ce
of a h le sha ll re rese t bina ry Z R The prese ce of
a h le sha ll re rese t bina ry ON
3.4.2 Each tra sv erse row of h les sha ll co ta in th
re rese ta tio of o ly o e ch racter with its pa rity b it
3.4.3 B its b, to b, of a cha ra cter from th 7-bit co e
ta ble sha ll b a ssig e resp ctiv ely to tracks 1 to 7
3.5 Pa rity b it
T o a llow protectio a ga inst erors in th ta pe punchin ,
a extra b it ca lle a “pa rity b it sha ll b a d d to e ch
co e cha ra cter
This b it sha ll b pla ce in tra ck 8 Its v a lue sha ll b ch se
so tha t th numb r of bina ry ON S in th same row is
e e (ev en pa rity )
3.6 Cha ra cter se ue ce a d directio of mo eme t of ta pe
T he directio of mov eme t of th punch d ta e sha ll b
Trang 4Transv erse rows on ea ch of whic
one c ha r a c ter may b rer esented
Code tr ac k n mbr
I I I I
I I I I
I I I I
I I I I
/
IO 0 0 0 0 0 0 0 0 0 0 0 0 0 0 F eed hole tr ac k
Code tr ac ks
I I I I
1 I I I
I I I I
I !& !
+ +
c c
Direc tion of
ta pe mov ement
-
\
\
Referene ede
Seqen e in whic the
c har a c ter s a r e pu c hed
a nd rea d
FIG RE 1 - C ha ra c ter a nd tr ac k la y out
Ev en p a r ity bit
I
6
b
Referene ed e
Bit identific a tion
L
Trac k n mbr
F IG R E 2 - B it-to-trac k a ssig ment